Giggly

[gig-uh l] /ˈgɪg əl/

verb (used without object), giggled, giggling.
1.
to laugh in a silly, often high-pitched way, especially with short, repeated gasps and titters, as from juvenile or ill-concealed amusement or nervous embarrassment.
noun
2.
a silly, spasmodic laugh; titter.
3.
Slang. an amusing experience, incident, etc.:
Going to a silly movie was always a giggle.
/ˈɡɪɡəl/
verb
1.
(intransitive) to laugh nervously or foolishly
noun
2.
such a laugh
3.
(informal) something or someone that provokes amusement
4.
the giggles, a fit of prolonged and uncontrollable giggling
5.
(informal) for a giggle, as a joke or prank; not seriously
v.

c.1500, probably imitative. Related: Giggled; giggling; giggly. As a noun from 1570s.